Large ore-bodies of granular and compact magnetite occur as beds and lenticular masses in Archean gneiss and crystalline schists, in various parts of Norway, Sweden, Finland and the Urals; as also in the states of New York, New Jersey, Pennsylvania and Michigan, as well as in Canada.
To Brewster is due the merit of suggesting the use of lenses for the purpose of uniting the dissimilar pictures; and accordingly the lenticular stereoscope may fairly be said to be his invention.
More often it consists of a thick felting of silk, either spun in one continuous piece into a globular form, as in the Aviculariidae, or composed of two plate-like pieces, an upper and a lower, united at the edges and lenticular in shape, as in some of the Lycosidae.
The spherical blanks soon gave place to lenticular-shaped ones.
Quartz and felspar, which under ordinary conditions form more equidimensional crystals, would assume lenticular forms. In the necessary co-operation of these three causes, viz.
As a result of this change of form the gastric cavity or coelenteron becomes of compressed lenticular form, and the endoderm lining it can be distinguished as an upper or exumbral layer and a lower or subumbral layer.
Corner of the state) and lenticular hills, or drumlins, but having a general S.E.
D'Orbigny's name for a genus of Perforate Foraminifera, distinguished by the flattened, lenticular discoid shell of many turns, finely perforated; chambers subdivided by incomplete septa into squarish chamberlets.
They are generally of lenticular form, and usually occur in or near the contact of eruptive rocks with schists or slates; the presence of the igneous rock being probably connected genetically with their origin.
Brown iron ores, appearing in the neighbourhood of Bendzin as lenticular masses 55 ft.
Halite may occur as a sublimate on lava, as at Vesuvius and some other volcanoes, where it is generally associated with potassium chloride; but its usual mode of occurrence is in bedded deposits, often lenticular, and sometimes of great thickness.
The mineral occurs generally in lenticular deposits, which may reach a thickness of more than loo ft.; but it is mined only to a limited extent, most of the salt being obtained from brine springs and wells which derive their saline character from deposits of salts.
In that belt they consist mostly of greywacke, grit, shale and other sedimentary rocks, but in the southwest of Ayrshire they include some thick lenticular bands of limestone.
If a drop of oil stands in lenticular form upon a surface of water, it is because the water-surface is already contaminated with a greasy film.
At first being used in their natural forms, these pebbles or gems have been grouped as lenticular or bean-shaped, and glandular or of the sling-bolt pattern; later, from the 6th to the 4th century B.C., they were fashioned as scaraboids, that is, in the general form of the Egyptian scarab, but without the sculptured details of the beetle's body.
The rocks consist of sandstones, quartzites, slates and shales, associated with lenticular masses of limestone.
In most cases this cornea is divided into lenticular facets corresponding to the underlying ommatidia.
It was wholly in the lower ice, but close against the upper, and was flattish, or perhaps slightly lenticular, with a rounded edge, a quarter of an inch deep by four inches in diameter; and I was surprised to find that directly under the bubble the ice was melted with great regularity in the form of a saucer reversed, to the height of five eighths of an inch in the middle, leaving a thin partition there between the water and the bubble, hardly an eighth of an inch thick; and in many places the small bubbles in this partition had burst out downward, and probably there was no ice at all under the largest bubbles, which were a foot in diameter.